🍄 Creamy Mushroom Sauce
Unlike the cold mayo-based sauces here, this is a warm pan sauce: mushrooms browned in butter, deglazed, and finished with cream into something glossy and deeply savory. Spoon it over a griddled patty and melted Swiss for a mushroom-Swiss burger that eats like a steakhouse dish.
🧾 Creamy Mushroom Sauce — Recipe Card
From I Love Hamburger — ilovehamburger.com
Ingredients
- 1¾ tbsp butter (14 g)
- 1¾ tsp olive oil (5 ml)
- 8¾ oz cremini or button mushrooms, sliced (225 g)
- 1¾ clove garlic, minced (about 1 tsp)
- 0.5 tsp fresh thyme leaves (0.5 g)
- 2¾ tbsp dry white wine or beef stock (30 ml)
- 0.33 cup heavy cream (80 ml)
- Salt and black pepper to taste
Instructions
- Heat the butter and oil in a skillet over medium-high. Add the mushrooms in a single layer and leave them undisturbed 2–3 minutes so they brown before stirring.
- Once golden and reduced, stir in the garlic and thyme and cook 30 seconds until fragrant.
- Pour in the wine or stock and scrape up any browned bits, letting it reduce by half.
- Lower the heat, add the cream, and simmer 2–3 minutes until the sauce coats the back of a spoon. Season with salt and pepper.
- Spoon warm over cooked burgers — it is best used right away.
🫙 Storage
Cool and refrigerate airtight for up to 3 days. Reheat gently on the stove or in short microwave bursts, stirring; add a splash of cream or water if it tightens. Freezing is not recommended, as cream sauces can separate.
🔁 Substitutions
- Use a mix of wild mushrooms for a deeper, earthier flavor.
- For a dairy-free version, use olive oil and swap the cream for full-fat coconut milk or a plant cream (the flavor will shift slightly).
🍔 What to put it on
Pair it with melted Swiss or Gruyère and caramelized onions. It especially shines on these burgers:
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Frequently asked questions
Why won't my mushrooms brown?
Crowding the pan steams them. Use a wide skillet over medium-high heat, give the mushrooms room, and leave them undisturbed for a couple of minutes so they can sear and release their water before you stir.
Can I make this sauce ahead?
Yes — cook it up to 3 days ahead and reheat gently, stirring in a splash of cream or water to loosen it. It is a warm sauce, so serve it hot over the burger.